[Bug 92308] New: Lenovo X1 OneLink Pro Dock + Lenovo 4k monitor fail
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Mon Oct 5 18:12:17 PDT 2015
https://bugs.freedesktop.org/show_bug.cgi?id=92308
Bug ID: 92308
Summary: Lenovo X1 OneLink Pro Dock + Lenovo 4k monitor fail
Product: DRI
Version: DRI git
Hardware: x86-64 (AMD64)
OS: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: DRM/Intel
Assignee: intel-gfx-bugs at lists.freedesktop.org
Reporter: benh at kernel.crashing.org
QA Contact: intel-gfx-bugs at lists.freedesktop.org
CC: intel-gfx-bugs at lists.freedesktop.org
Machine: Lenovo X1 Gen 3 with OneLink Pro dock
Monitor: Lenovo 4k monitor "Pro 2480mD"
If I connect the monitor using the X1's built-in mini-DP with a DP1.2
compatible mini-DP to DP cable, things work fine (more/less, the monitor
sometimes fails to come back from idle blanking but I'll file that as a
separate issue).
If I connect the monitor to the dock using the DP-DP cable coming with the
monitor, the monitor doesn't sync. It displays an error about no sync. dmesg
fills up with error messages from the driver which I will attach.
$ uname -a
Linux pasglop 4.3.0-rc4+ #1 SMP Tue Oct 6 11:46:15 AEDT 2015 x86_64 x86_64
x86_64 GNU/Linux
git head is 1ff47c81ae9fcf16e40292478b7dd8c1d68130c1 from the drm-intel git
tree
using the nightly branch.
If I use xrandr to use a lower resolution (1080p for example), I had it working
once or twice. I tried to use 4k at 30Hz but that resulted in a driver crash
taking out the internal panel as well (reproduceable) with a previous 4.3-rc
kernel.
I will update this with more tests of the above using this latest kernel.
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